Our Sages said, a person’s heavenly trial begins with his Torah learning. This is actually quite obvious, because when a person goes on a business trip, the first question people ask is how much he made, and if he wasted his time in leisure he will come back empty handed, the laughing stock of the town for travelling so far for naught. All the more so this is true of a person who comes all the way down to this world from his place under the divine thrown, and wastes his time here in leisure and frivolity instead of acquiring the goods that are very cheap here and very precious there. So it is obvious that the first question we will be asked is, did you bring the Torah you were sent to bring?
י״ט באלול ה׳תש״פ
"והאמת בלתי שום ספק כלל, שאם היה העולם כולו מקצה עד קצהו פנוי חס ושלום אף רגע אחד ממש מהעסק והתבוננות שלנו בתורה, כרגע היו נחרבים כל העולמות, עליונים ותחתונים, והיו לאפס ותוהו חס ושלום". (נפש החיים) 1